Right now all players cannot, even in theory, take an identical number of Pass and Play turns as each other given the current rules and 76 commodity tokens (80-4 random). If there's any bias in the game toward Passing or Playing then one player or team can be disadvantaged.
The game seems like it should have shipped with 84 or 88 tokens. This would give each player (in theory) the same number of Pass and Play turns as all other players if you wanted it. Here's how:
1) Remove one token of each commodity color until you get down to 84 tokens and then discard 4 more at random. The 80 remaining token are evenly divisible by 8 in 2-player play and 16 in 4-player play. That means each team gets the same number of Pass and Play turns. (80 tokens in play)
2) Similarly, if you have 88 tokens and are playing a 3-player game, you discard four random tokens and each player can now have an equal number of Pass and Play turns if everyone wants to. (84 tokens in play)
3) If you have Fewer than 88 tokens then for a 3-player game you discard an equal number of each commodity color until you get to 76, then pull four at random. (72 tokens in play)
Note than #3 can currently be used in a 3-player game with the standard 80 tokens that the game normally ships with.
Of course, players may not take an equal number of Pass and Play turns as each other even with a token change, but it would create that option that a player could actively pursue if he so desired.
What I don't know is if there's a first move or last move advantage. If there's some late play advantage then you might not want the number of tokens evenly divisible by the number of players. However, in that case then you would still want a precisely determined number of tokens based on the number of players, and not 76 tokens in player for all groups of players.